The gymnotiform mode of aquatic locomotion is characterized by the use of an elongated anal fin, generically referred to as a ribbon fin. The extraordinarily maneuverable weakly electric black ghost knifefish (Apteronotus ...

This video shows the orientational behavior of a hinged cylinder suspended in a water tunnel with Reynolds number (Re) ranging between 100-6000 and reduced inertia (I*) in the range 0.1-0.6. The
cylinder displays unique ...